Tank filter



p 1929 c. e. HAWLEY 1,726,827

TANK FILTER Filed May 4, 1925 Patented Sept. 3, 192 9. 1

UNITED STATES 1,726,827 PATENT OFFICE.

CHARLES GILBERT HAWLEY, OI CHICAGO, ILLINOIS, ASSIGNOR TO GENTBIIIX COB- .POBATION, 0F CLEVELAND, OHIO, A. CORPORATION OF OHIO.

TANK FILTER.

Application filed May 4, 1925. Serial No. 27,858.

My invention relates to means for purifying water as it leaves the tank or reservoir containing it. As will presently appear the device or fixture embodying my invention may be employed in the purification of liquids generally under such conditions and further, may be combined with the stop valve. which controls the flow of the liquid.

The invention will be readily understood on reference to the accompanying drawing; in which Fig. l is a vertical section of a centrifugal fixture comprising a water purifier embodying my invention, on the line 11 of Fig. 2; Fig. 2 is a vertical section on the line 2 -2 of Fig. 1; Fig. 3 is a horizontal section on the line 3-3 of Fig. 1; Fig. 4 is a section on the line 44 of Fig. 1; Fig. 5 illustrates the application of the invention to a locomotive tender; and Fig. 6 its application to a railway water tank or tower.

In Figs. 1 and 2-the plate 2 represents the bottom of the liquid tank. That bottom contains a large hole 3. The kettle-shaped casting or forging 4 hangs from the floor 2 and presents an open top 4' which registers with the hole 3. Preferably the means'of attachment comprises the integral flange '4" at the top of the pot or casing 4.

Near the top is a circumferential internal flange 4 which serves as the seat for the wide flange 5 of the stop valve 6. The stop valve shown is the form usually employed in locomotive tender tanks, and occupies its usual position, being operated b means of the vertical stem 6'. The valve ange 5 is attached to the casing and made tight by a packing and a number of bolts 5.

Midway between the top and bottom of the kettle 4 is a second and wider circumferential flange 4 preferably containing a shoulder or seat 4. It also contains the large central opening 4. Both the shoulder 4 and the opening 4' are coaxial with the stop valve 6. The part 4 is an integral elbow formed within the bottom of the kettle and externally ex-' tended to provide the nipple 4 to which the flexible hose 7 (see Fig. 6) is attached. The upper end of the elbowportion 4 contains a central opening 4 which is considerably smaller than the opening 4. The upper end of the elbow terminates in the circumferential flange 4 which is also of greater diameter than the opening 4. By preference, the top of the flange is characterized by the circumferential shoulder 4 and the downwardly pitched or beveled marginal part 4. The top of the elbow flange 4 stands considerably below the under side of the flange 4 thereby leaving the circumferential s ace 4 which opens directly into the top 0 the cavity 8 surrounding the elbow 4. The member 9 comprlsing, the bottom ring 9, the .tuyere blades 9", and the closed top 9 constitutes a multiple tangential tuyere; through which the descending-liquid must pass to reach the open elbow 4. The complete circumferential series of tangential blades 9 appears in Fig. 3 which also discloses the many tangential tuyeres 9 The tuyere or tuyere ring 9 is seated in the shoulder 4 and is held by two ormore clamping bolts 9. It is of low height and large diameter, yet its tuyeres 9 have an aggregate area exceeding that of the valve 6, also that of the nipple 4.

It is to be noted that the bottom of the elbow 4 stands above the bottom of the kettle or casing 4. Thus space is provided for the short valve casing 4 having two ports 4 which open into the space or cavity 8. y The casing 4" is bored to receive the tapered valve plug 10, having ports 10' that can be turned to register with the ports 4. This small valve is preferably coaxial with the stop valve 6, is set at substantially right angles thereto and is connected therewith by a short stem 10", to turn with the stop valve. As sh own the stem extends through a hole provided in the top 9 of the tuyere 9. 7

The stop valve, as is usual on tender tanks, is opened and closed by means of a lever 6". The arrangement is such that when the stop valve is completely open the small plug valve 10 is closed; and when the stop valve 6 is nearly shut the plug valve 10 is open, and obviously, remains open so long as the stop valve 6 is completely closed. This relation of the valves may of course be varied to suit the judgment of the locomotive designer.

Upon the opening of the stop valve 6 the water rushes downward over and around the tuyere 9, and through that, to the outlet 4 and discharge elbow 4". The tangential tuyeres through which the water must pass divide the stream into many relatively thin streams or films which must move in a direction transverse to the lon itudinal axis of the tu ere. The result of thlsis that the heavier su stances, generally termed solids, carried by the water are instantly projected or impacted against the inner sides of the tuyere blades, and further, all of the water occupying the tuyere, the circumferential space or gap 4 and the top of the outlet 4 is set into rapid rotation. It follows that the initially separated solids areheld in a separated state by centrifugal force and upon reaching the circumferential gap 4 are centrifugally-proljected againstthe wall of the casing beneath the flange 4:", thence to-sink'into the cavity 8 through the relativel quiet body of water occupying it. 'Thus, t e solids are centrifugal- 1y extracted from. the flowing stream by energy derived from its fall and are deposited in the cavity 8, leaving the clarified liquid to escape through the outlet or elbow 4 From the latter the water is conducted to the injector or pump of the locomotive which drives it into the locomotive boiler. The great advantages in boiler operation and boiler maintenance will at once be apparent to those skilled in the art.

During the operation of the locomotive the stop valve lever 6 is occasionally worked to open the plug valve 10 and discharge the accumulated solids onto the track. If this intermittent operation of the stop valve is objected to, a separate valve lever may be applied to the sludge valve 10. But the danger is that an independent valve lever will be neglected and the sludge valve left open and resultin emptying the tank.

When applied to larger tanks, as in the case represented in Fig. 6, the purifier is of greater size and the main stop valve 11 may be arranged in connection with the discharge spout 12. Further, the kettle or casing 4* may be deeper to provide a large sludge cavity, and it may have an independently operated sludge valve 10.

Lest it be thought that the proportions and the shape illustrated in Figs. 1 and 2 are not important, attention is called to the necessity of making the fixture as small as possible in height and with a bottom that shall att'ord adequate clearance between the fixture and the wheeled truck which carries the front end of the tender.

Having thus described my invention I claim as new and desire to secure by Letters Patent 1. The herein described liquid purifier, comprising a bowl-like casing which is open at the top and the lower part of which contains a centrally positioned stand-pipe serving as the outlet for the purified liquid, in combination with means at the top of said casing for attaching it to the bottom of a liquid tank, a whirl-promoting tuyere centrally positioned in said casing and operatively interposed between the upper and lower parts of said casing, and also positioned above the upper end of said stand-pipe, means closing the top of said casing, a stop valve positioned thereon and means for emptying the sludge from the bottom of said casing.

2. T he herein described liquid purifier, comprising a bowl-like casing which is open at the top and the lower part of which contains a centrally positioned stand-pipe serving as the outlet for the purified liquid, in combination with means at the top of said casing for attaching it to the bottom of a liquid tank, a whirl-promoting tuyre centrally positioned in said casing and operatively interposed between the upper and lower parts of said casing, and also positioned above the upper end of said stand-pipe, means closing the top of said casing, and means for emptying the sludge from the. bottom of said casing.

In testimony whereof I have hereunto set my hand this 30th day of April, A. D. 1925.

CHARLES GILBERT HAWLEY. 

